Electrical switch.



R. H. MANSON. 'ELBGTRIGAL SWITCH.

AYPLIQATION FILED FBB.2V8,1907.

926;951. Patented July e, 1909.

v yunirsi; sTAtriis OFFICE.

RAY H. MANSON, OF ELYRIA, OHIO, ASSGNOR T THE DEAN ELECTRIC COMPANY, OF ELYRIA,

I OHIO, A lGOIE'PORATION OF OHIO.

' ELECTRICAL IWITUH.

lence being had thereinto he No. 826,951. Specification of Toallwhmn'itmayconcem:

Be it known-.that I, RAY H. Manson, a, citizen of the United States, residing 'at Elyria, in the count -of and State of Ohio, have inven certain new and useful Improvements 1in Electrical Switches,- of* which the followingisl cation, refieraccompanying drawing.

My invention relates to electrical switches, andparticularly to `these' having sgroup of contacts or other operative parts, whose condition or relations may be ch ed bythe manipulation of a handle or si ar device. In most cases the operative parts are mounted as a unit within-.a suitable casing, and the handle or other actuating element projects from the casing. The projection of this element from the casing as well as the mode'of its insertion andremoval and ofthe assembling of the switch, are frequently productive of embarrassment not only to the designers,4 but who are afterward ca led upon'to assemble land to handle, pack-f and un ack the co lete piecesof apparatus.

The orm of switnhin which m invention is shown and described as embodied, for'the purpose of thiap lication, is that used in connection withsu ribes tele hone outfits, and particularly with so-c ed wall sets f. Its inode of. adaptation to other forms will be apparent to those skilled in the art without specific description.

My invention has for its object the design of a switch in which the actuating element whethera handle as used in many forms of switch, or a hook lever as used in telephone4 sets, may 'readily be detached from and attached to the operative` arts of the switch without otherwise disturbing their relations or arran ement.

In or er to attain my. object I provide a fixed pivot for the actuating element or lever, which serves as a fulcrum and with which the lever en ages by means of a notch or recess. Preferalily -between the point of application ofcpower and the fulcrum of the lever, I pro'- vi e a yielding retaining device actingA to maintain the lever in engagement with its fulcruin and in a direction opposed to that'of the operating power. As long' as this yieldin device ietainsfits resilience, the switch wi l operate without danger' of displacing the lever, while the latter may be detached from Letters Patent.

sion ,ofthe yielding device. The pointsof application, of power and of 4the opposing yie ding device'may be shifted with respect tothe fulcrum'according' to the order to which theV lever. belongs. The extent of movement of the leveris immaterial, as long as the retaining fessure follows thro hout the amplitude o movement to maintain the Patented July e, 190e. Applicationl led l'ebraary 28. 19W. Serial 110.359,904. l i

Vengagement cil-'the lever 'andthe fulcmm.

`The' yielding device, as I havecalled it', may

be .reduced "to a latch the p ivot or .fulcrum, in which ease it is not essential that lit should exert pleasure" directly in opposition to theipcwerysolong as it retains the lever-ine g ,-11 tv'lntliitspivot.V

In 4the teEphon'e switchv hereinafter described, the actuating element isthe hook 1ever, its fulorum is ,the rdina'ry pivot post on the switch base, and the yielding deviceis the actuating spring which tends to throw up the '115` lever when the telephone receiver is removed from the hook. By employingthe actuating .s rin dldube the utmostsimplicity, no change being required as a matter of fact except the cutting .out of one side of the pivot bearing in the lever to form a notch. i

. By. means of m invention, the embarrass-A "ments to which have referred are entirely obviated. VThe openingV inthe casing through which ,the operatin lever must ex.- tend can be made small an ineonspicuous, and the lever may. he removed except when the instrument `is actually inuse, whereh an annoying external piojection is dispos of, packing cases may made smaller, and the risk `of damagetov-en instrument in handlin or "during shil ment is considerably lessene My invention is better illustrated in the drawin forming a partof this specification to whic reference is made. l

The cabinet C ordinarily used to contain the telephone apparatus at a substation has located therein a base B, from one end of which a bracket bI l supporting a in The bracket l also supports in t e manner indicated switch e telephone apparatus in a manner well known. The iii P is adapted to engagea hook hEl forme on the right hand end ,of a receiver hook H, which extends through an opening cl in the side of the cabinet C. An

thefulcrum at any time by suitable compresescutcl-ieonpl'ate c is provided on the outside as the retaining -device'itv is given a; function, andthe parts are ieduced to springs s, s1, adapted to control circuits oft pliojects for the pu osegf of the cabinet to cover the opening c1, a slot being formed in the plate c to just afford a suiicient clearance for the receiver hook H so that it may move vertically to control the switch springs s and s1. The left hand end of the receiver hook H is formed in the customary manner andconsists of two jaws h adapted to support the receiver. The base B has secured thereto a spring S, to the upper and right hand end of which a block h2 is secured. This block h2 extends from the spring S to the underside of the hook H, as a result oi' which when the receiver is not in place on the jaws h the hook H is moved to its upper position by the operation of the spring S. The contact spring s1 is secured to the block 7i?, which is of insulating material,

as a result of which when the hook H is.

moved downward, the switch springs 8 and s1 are separated, and when the hook H is moved upward by the spring S the contact springs` s and s1 are brought together.

The hook h3' which engages the pin P is formed on the right hand of the receiver hook II, in order that the receiver hook may be removed from the pin P and from the cabinet by depressing the receiver hook with in the cabinet sufiiciently to disen age the right hand end h from the pin P. A ter such disengagement the receiver hook may be withdrawn from the cabinet to the left through the opening c1 and the escutcheon plate c. A sto b3 secured to the base B is provided in or( er to limit the upward-mo.- tion'iof the spring S when the receiver hook H is removed from the in P.

I It is thought that rom the description of the arrangement of parts just indicated the operation of the device is apparent to those familiar with telephone practice and that therefore further description of they operation of the mechanism is not needed'.

While I have shown my invention in the particular embodiment herein described,.I do not, however, limit myself to this exact construction, but desire'to claim any equivalent construction that Will suggest itself to those skilled in the art.

esegesi- Having thus described my invention, what I claim and desire to secure by Letters Patent is y 1. In a hook switch for effecting circuit changes in a telephone set, a box or housing for the apparatus of the set, a base supported in the box, a bearing on such base, switching springs mounted in the box i or changing circuit conditions as desired, a switch hook adapted to removably engage such bearing and to project outside of the box to support a receiver, and a returning spring having its free end mechanically connected to but insulated from the circuit changing springs.

2. In a hook switch for effecting circuit changes in a telephone set, a box or housing for the apparatus of the set, a base supported in the box, a bearing on such base, switching springs mounted in the box for changing circuit conditions as desired, a switch hook adapted to removably engage such bearing and to project outside of the box to support a receiver, and a returning s ring mechanically connected to the circuit ciianging springs, such connecting means constituting means for insulating such switch hook and such returning spring from the circuit changing springs.

3. n a hook switch for effecting circuit changes in a telephone set, a box or housing for the apparatus ofthe set, a base supported in the box, a bearing on such base, switching springs mounted in the box for changing1 circuit conditions as desired, a switch adapted to` removably engage such bearing and to projectoutside of the box to support a receiver, and a'returning spring having its free end connected to the circuit changing springs, such returning spring independent of thev circuits through suchcircuitc ranging springs. I

In testimony whereof I afiix my signature in presence of two witnesses.

RAY H. MANSON.

Witnesses:

.GEo. A. ScoviLLE,

S. J. RoBERTs.

ook f 

